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Table of Contents
Year : 2012  |  Volume : 28  |  Issue : 2  |  Page : 232-234

Preoperative neurogenic pulmonary edema: A dilemma for decision making

Department of Anesthesiology, Nizam's Istitute of Medical Sciences, Punjagutta, Hyderabad, Andhra Pradesh, India

Date of Web Publication11-Apr-2012

Correspondence Address:
Padmaja Durga
Department of Anesthesiology, Nizams Institute of Medical Sciences, Punjagutta, Hyderabad - 500 082, Andhra Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0970-9185.94905

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Neurogenic pulmonary edema may be a less-recognized consequence of obstructive hydrocephalus. The authors report a patient with acute obstructive hydrocephalus due to cerebellar metastatic lesion, who presented with neurogenic pulmonary edema. The edema resolved on placement of the ventriculoperitonial shunt. This report addresses the importance of recognition of neurogenic pulmonary edema as a possible perioperative complication resulting from an increase in intracranial pressure and the issues involved with anesthetic management of co-existing neurogenic pulmonary edema and intracranial hypertension.

Keywords: Anesthesia, neurogenic pulmonary edema, obstructive hydrocephalus, postoperative, preoperative, management, resolution

How to cite this article:
Lakkireddigari SR, Durga P, Nayak M, Ramchandran G. Preoperative neurogenic pulmonary edema: A dilemma for decision making. J Anaesthesiol Clin Pharmacol 2012;28:232-4

How to cite this URL:
Lakkireddigari SR, Durga P, Nayak M, Ramchandran G. Preoperative neurogenic pulmonary edema: A dilemma for decision making. J Anaesthesiol Clin Pharmacol [serial online] 2012 [cited 2021 Jun 18];28:232-4. Available from:

  Introduction Top

Acute neurogenic pulmonary edema (NPE) is an underdiagnosed yet a common clinical entity. It can occur after virtually any form of injury of the central nervous system. NPE is a potential contributor to the pulmonary dysfunction that occurs in these patients. High index of suspicion is required for the diagnosis. Presence of preoperative NPE presents a dilemma to the neuroanesthetist due to the divergent goals of management of raised intracranial pressure and pulmonary edema and also the possible adverse interaction of the two conditions when they co-exist. We report a patient with acute obstructive hydrocephalus due to cerebellar metastatic lesion who presented with NPE that resolved on placement of the ventriculoperitonial (VP) shunt.

  Case Report Top

A woman, about 50-year-old, presented with progressive headache, holocranial and continuous type, associated with multiple episodes of vomiting and swaying gait of two months duration. Her magnetic resonance imaging (MRI) brain revealed fourth ventricular obstruction with obstructive hydrocephalus. As the patient was drowsy though responding to verbal commands and oriented, an emergency VP shunt was planned. She had an unremarkable past history with no previous history of tuberculosis or respiratory illness. Her cranial nerves were intact. There was no motor or sensory deficit. She had a pulse rate of 65 per minute and her blood pressure was normal. Her respiratory rate was 22/min. Electrocardiogram was normal. Chest X-ray showed slight haziness in the right lung suggestive of pulmonary edema- [Figure1]. All other clinical and biochemical investigations were normal. The peripheral oxygen saturation (SpO 2 ) was around 84% and the arterial blood gases showed a PaO 2 53 mmHg. The SpO 2 increased to 92% on administration of 100% oxygen through the face mask of the anesthetic circuit. As there was no other cause for the respiratory dysfunction such as infection, aspiration, or previous respiratory illness, a diagnosis of NPE was considered. Anesthesia was induced with propofol 2 mg/kg and oral endotracheal intubation was facilitated with vecuronium 0.1 mg/kg body weight. Anesthesia was maintained with air and oxygen mixture, adjusting the FiO 2 to maintain an arterial saturation of >90%, and 1% isoflurane along with atracurium and fentanyl infusions. No positive end expiratory pressure (PEEP) was applied. The SpO 2 was 95% with controlled mechanical ventilation with a FiO 2 of 0.8. Patient remained hemodynamically stable and mean arterial blood pressure (MAP) was maintained at 80 mmHg. VP shunt was performed uneventfully. After the cerebrospinal fluid (CSF) drainage SpO 2 gradually increased to 100% and the FiO 2 could be reduced to 0.5.The neuromuscular blockade was reversed at the conclusion of surgery. The patient was awake, responding to verbal commands with normal motor power and tone. She was breathing spontaneously with no evidence of respiratory distress. Trachea was extubated and patient was monitored in the neurosurgery intensive care unit. Postoperatively, the PaO 2 was 253 mmHg on oxygen supplementation with a face mask delivering a FiO 2 of 0.4. The patient was hemodynamically stable with a MAP of 90 mmHg. Her sensorium improved with return of consciousness and orientation to normal levels. Postoperative chest radiograph showed resolution of pulmonary edema [Figure 2]. Definitive surgery of craniotomy and excision of the lesion was performed one week later. She had an uneventful intraoperative and postoperative course.
Figure 1: Preoperative chest radiograph of the patient showing pulmonary infiltrates suggestive of pulmonary edema

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Figure 2: Immediate postoperative chest radiograph of the patient showing resolution of pulmonary infiltrates

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  Discussion Top

NPE may be a consequence of a number of diverse central nervous system insults, including head trauma, [1] brain stem lesions, [2] rupture of intracranial aneurysm, [3] excessive irrigation during endoscopic ventriculostomy, [4] during angioplasty for vasospasm, [5] and postictal period. [6] It is often underdiagnosed due to its non-specific clinical manifestation. It may manifest as acute pulmonary distress. [7] Diagnosis requires a high index of suspicion, especially in the case of respiratory decompensation in neurosurgical patients.

The pathogenesis of NPE probably involves overactivation of the sympathetic autonomic system with pulmonary hypertension, [8] endothelial dysfunction, [9] and increased vessel permeability. [10] There are two theories on how it occurs: the blast theory and the permeability defect theory, with evidence in favor of both of them. NPE is probably the result of a combination of these two. The treatment is mainly supportive using mechanical ventilation and alpha-adrenergic blocking agents for managing increased pulmonary arterial pressure.

Anesthetic management of patient with NPE has not been reported widely. Airway interventions like laryngoscopy and intubation may precipitate NPE. [11] It has been hypothesized that deep levels of anesthesia might protect against the development of NPE due to a more pronounced inhibition of the hypothalamic, brainstem, and spinal vasoactive sympathetic centers. [12] An insufficient anesthesia level may not be able to inhibit the sympathetic nervous system during an injury of the central nervous system and thus predispose to development of NPE. Therefore, maintenance of adequate depth of anesthesia and attenuation of neuroendocrine response to intubation are important.

The use of PEEP in neurosurgical patients is limited by conflicting reports on its effect on intracranial pressure. [13],[14] The presence of raised intracranial pressure and the need to provide good brain relaxation for surgery may limit the application of PEEP. Use of PEEP is safe when adequate MAP is maintained. [15] A high FiO 2 was sufficient to maintain optimal blood gases without the necessity for PEEP in this patient. The reduced lung compliance and high intrathoracic pressure during mechanical ventilation in the presence of pulmonary edema may also pose a problem for providing brain relaxation.

The cerebrogenic autonomic and neurohumoral dysregulation due to intracranial hypertension may cause intraoperative hemodynamic dysfunction. Our patient remained hemodynamically stable throughout the procedure. There was no other detectable systemic cause for the pulmonary edema in this patient. A thorough understanding of the patho-physiological mechanisms behind the development of NPE helps in the management of these patients, thus preventing further complications. Neurogenic pulmonary edema may resolve after treatment of underlying condition. NPE after aneurismal sub-arachnoid haemorrage was shown to resolve after endovascular coiling. [16] and after ventriculoperitonial shunt in a patient with shunt malfunction. [17] NPE in this patient resolved after ventriculoperitonial shunt.

In conclusion, in patients with central nervous system pathology in respiratory distress, the possibility of diagnosis of NPE must be considered and the inciting pathology should be deliberated. Anesthetic management must be carefully titrated considering the divergent goals of NPE and intracranial hypertension.

  References Top

1.Rogers FB, Shackford SR, Trevisani GT, Davis JW, Mackersie RC, Hoyt DB. Neurogenic pulmonary edema in fatal and nonfatal head injuries. J Trauma 1995;39:860-6.  Back to cited text no. 1
2.Brown RH Jr., Beyerl BD, Iseke R, Lavyne MH. Medulla oblongata edema associated with neurogenic pulmonary edema. Case report. J Neurosurg 1986;64:494-500.  Back to cited text no. 2
3.Muroi C, Keller M, Pangalu A, Fortunati M, Yonekawa Y, Keller E. Neurogenic pulmonary edema in patients with subarachnoid hemorrhage. J Neurosurg Anesthesiol 2008;20:188-92.  Back to cited text no. 3
4.Davidyuk G, Soriano SG, Goumnerova L, Mizrahi-Arnaud A. Acute intraoperative neurogenic pulmonary edema during endoscopic ventriculoperitoneal shunt revision. Anesth Analg 2010;110:594-5.  Back to cited text no. 4
5.Brewer RP, Borel CO. Neurogenic pulmonary edema during intracranial endovascular therapy. Neurocrit Care 2004;1:423-7.  Back to cited text no. 5
6.Liao JJ, Wong CW, Cheng WC, Tzaan WC. Postictal neurogenic pulmonary edema during uncal herniation-a case report and literature review. Changgeng Yi Xue Za Zhi 1995;18:68-72.  Back to cited text no. 6
7.Bilik M, Karlinski M, Czlonkowska A. Acute respiratory distress syndrome as a manifestation of brain stem tumour-a case report. Neurol Neurochir Pol 2009;43:570-4.  Back to cited text no. 7
8.Malik AB. Pulmonary vascular response to increase in intracranial pressure: Role of sympathetic mechanisms. J Appl Physiol 1977;42:335-43.  Back to cited text no. 8
9.Minnear FL, Kite C, Hill LA, van der Zee H. Endothelial injury and pulmonary congestion characterize neurogenic pulmonary edema in rabbits. J Appl Physiol 1987;63:335-41.  Back to cited text no. 9
10.Melon E, Bonnet F, Lepresle E, Fevrier MJ, Djindjian M, Francois Y, et al. Altered capillary permeability in neurogenic pulmonary oedema. Intensive Care Med 1985;11:323-5.  Back to cited text no. 10
11.Lopez-Alvarez S, Pensado A, Encinar L, Calvo-Pillo R. [Pulmonary edema of neurogenic origin and transtentorial hernia during anesthesia induction in a child with ventriculoperitoneal shunt]. Rev Esp Anestesiol Reanim 1998;45:201-3.  Back to cited text no. 11
12.Sedy J, Likavcanova K, Urdzikova L, Zicha J, Kunes J, Hejcl A, et al. Low degree of anesthesia increases the risk of neurogenic pulmonary edema development. Med Hypotheses 2008; 70:308-13.  Back to cited text no. 12
13.Videtta W, Villarejo F, Cohen M, Domeniconi G, Santa Cruz R, Pinillos O, et al. Effects of positive end-expiratory pressure on intracranial pressure and cerebral perfusion pressure. Acta Neurochir Suppl 2002;81:93-7.  Back to cited text no. 13
14.Rickels E. Monitoring intracranial pressure. Indication, limits, practice. Anaesthesist 2009;58:398-404.  Back to cited text no. 14
15.Georgiadis D, Schwarz S, Baumgartner RW, Veltkamp R, Schwab S. Influence of positive end-expiratory pressure on intracranial pressure and cerebral perfusion pressure in patients with acute stroke. Stroke 2001;32:2088-92.  Back to cited text no. 15
16.Fujimura M, Nishijima M, Umezawa K, Kon H, Tanaka T, Midorikawa H. Severe subarachnoid hemorrhage with pulmonary edema successfully treated by intra-aneurysmal embolization using Guglielmi detachable coils-Two case reports. Neurol Med Chir (Tokyo) 2001;41:135-9.  Back to cited text no. 16
17.Hofstetter T, Mirzayan MJ, Krauss JK. Ventriculoperitoneal shunt dysfunction in a patient presenting with neurogenic pulmonary edema. Case report. J Neurosurg 2007;106:701-3.  Back to cited text no. 17


  [Figure1], [Figure 2]

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